Spacer beads are used to provide space between the main pattern of a bracelet, necklace, or other bead craft project. Usually, they are more narrow than the main design beads, and are uniform so they can be repeated to any desired length. Spacer beads are often, but not always, made of metal. When the spacer beads need to match a specific color palettte, Crystal Rondelles or O Beads, or even Gemstone Rondelles can be used because of their shape and color variety.